*{
  margin: 0; padding: 0;
}

a{
  text-decoration: none;
}

li, ol{
  list-style: none;
}

body{
  /* 文字属性 */
  font-size: 14px;
  font-family: "Arial","Microsoft Yahei";
  background-color: #f2f2f2;
  /* 防止左右晃动 */
  overflow-x: hidden;
}

/* 清除浮动 */
.clear:after{
  content: "";
  display: block;
  clear: both;
}

/* 向左浮动 */
.fl{
  float: left;
}

.fr{
  float: right;
}
